904721400 has 240 divisors, whose sum is σ = 3428564040. Its totient is φ = 219283200.

The previous prime is 904721371. The next prime is 904721407. The reversal of 904721400 is 4127409.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904721407) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 175662 + ... + 180738.

Almost surely, 2^904721400 is an apocalyptic number.

904721400 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 904721400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1714282020).

904721400 is an abundant number, since it is smaller than the sum of its proper divisors (2523842640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

904721400 is a wasteful number, since it uses less digits than its factorization.

904721400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116 (or 5098 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 904721400 is about 30078.5870678794. The cubic root of 904721400 is about 967.1747599765.

Adding to 904721400 its reverse (4127409), we get a palindrome (908848809).

The spelling of 904721400 in words is "nine hundred four million, seven hundred twenty-one thousand, four hundred".